Orky15, this will probably surprise a lot of people here because of my reputation for being able to find amazing bargains at Disney, but I think your budget sounds a little bit on the LOW side for what you're hoping to do.
The regular rates for YC Concierge Lagoon View are $445-615 per night in 2001, depending on season. To get such a room for $300 a night would mean a huge discount. I'm not saying it's impossible, but if you haven't already found this rate and booked it for your dates, don't assume it will be available.
The rate at the Hyatt is about right -- have you checked availability and rates for your dates? It could go higher -- or you could luck out and get a $99 rate like we did.
If you can get business-class tickets from Ohio to Orlando for as little as $600 per person, you know something I don't. Business class and first class tickets are EXPENSIVE. The only way you're going to get them for less is to use frequent flyer miles to upgrade a coach fare. If you don't have enough miles, maybe someone in your family does and would be willing to make a wedding gift of them. That person would have to buy the tickets in your name.
You might be able to get your passes for slightly less. I know of a site that sells a 4-day Hopper Plus (yes, a Plus) for $205 each plus $10 shipping per order. I haven't used this site or talked to anyone who has bought tickets from it, so it's not on MouseSavers, but if you're interested I'll be happy to send you the URL.
Lastly, don't forget about taxes, which will add 6% to your totals.
I don't mean to depress you. I just think you will have to scale back your expectations a little if you're going to stay under $3000!